28056311439 has 64 divisors (see below), whose sum is σ = 42088757760. Its totient is φ = 16512122880.

The previous prime is 28056311417. The next prime is 28056311441. The reversal of 28056311439 is 93411365082.

It is not a de Polignac number, because 28056311439 - 2⁵ = 28056311407 is a prime.

It is a super-2 number, since 2×28056311439² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28056311439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056311489) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27532672 + ... + 27533690.

It is an arithmetic number, because the mean of its divisors is an integer number (657636840).

Almost surely, 2^28056311439 is an apocalyptic number.

28056311439 is a deficient number, since it is larger than the sum of its proper divisors (14032446321).

28056311439 is a wasteful number, since it uses less digits than its factorization.

28056311439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 28056311439 in words is "twenty-eight billion, fifty-six million, three hundred eleven thousand, four hundred thirty-nine".